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题名: Structures of highly siliceous ZSM-5 zeolites and Ti-ZSM-5 zeolites obtained by indirect synthesis
作者: Zhao, Q;  Han, XW;  Liu, XM;  Liu, XC;  Zhai, RS;  Bao, XH;  Tin, LW;  Guo, XW;  Zhang, FH;  Wang, XS
关键词: MAS NMR ;  IR ;  ZSM-5 zeolites ;  Ti-ZSM-5 zeolites ;  indirect synthesis
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 1998-04-01
DOI: 10.3866/PKU.WHXB19980407
卷: 14, 期:4, 页:320-326
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: Solid state NMR with magic angle spinning(MAS) and cross polarization(CP) techniques, and IR spectroscopy have been used to investigate the structural characterizations of the highly siliceous ZSM-5 (S-1) zeolites synthesized using various organic ammoniums or amines as templates and the Ti-ZSM-5 zeolites prepared by the solid reaction of ZSM-5 zeolites with titaniumtetrachloride vapor at 873K. It has beenshown that the structure of the ZSM-5 zeolite is strongly governed by the variety of the templates: used in the synthesis, and the zeolites templated by TEABr and HDA present the orthorhombic symmetry, while those prepared using TPABr and TPAOH as templates exhibit only monoclinic symmetry. Furthermore, the distribution of the structural defects in the obtained zeolites was found to be also dependent on the templates used. These T-atom defect sites in the framework, defined as Si(OSi)(3)O-, are available for the insertion of Ti atoms in the subsequent reaction with titaniumtetrachloride vapor at elevated temperatures and the concentration of defects was proved to be correlative to the amounts of Ti atoms being derived into the framework of zeolite.
关键词[WOS]: SILICALITE-1 ;  BROMIDE ;  C-13
语种: 英语
WOS记录号: WOS:000074858600007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138173
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Dalian Univ Technol, Open Lab Comprehens Utilizat Carbon Resource, Dalian 116012, Peoples R China

Recommended Citation:
Zhao, Q,Han, XW,Liu, XM,et al. Structures of highly siliceous ZSM-5 zeolites and Ti-ZSM-5 zeolites obtained by indirect synthesis[J]. ACTA PHYSICO-CHIMICA SINICA,1998,14(4):320-326.
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